Quarterly report [Sections 13 or 15(d)]

PATENTS (Details)

v3.26.1
PATENTS (Details) - USD ($)
Mar. 31, 2026
Dec. 31, 2025
Patents    
  Gross carrying amount – patents $ 9,262,000 $ 8,887,000
Accumulated amortization – patents (7,452,000) (7,408,000)
  Patents, net $ 1,810,000 $ 1,479,000